Android 安卓:震动探测器太敏感了
我正在尝试检测震动-我正在使用以下代码, 它工作得非常好,但在某些设备(例如Galaxy note 2)中,它检测到震动的时间太快(在某些情况下,当我只是保持手机静止时) main.java:Android 安卓:震动探测器太敏感了,android,android-sensors,Android,Android Sensors,我正在尝试检测震动-我正在使用以下代码, 它工作得非常好,但在某些设备(例如Galaxy note 2)中,它检测到震动的时间太快(在某些情况下,当我只是保持手机静止时) main.java: ShakeListener mShaker = new ShakeListener(this); mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () { public void onShake()
ShakeListener mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
public void onShake()
{
// Some code...
}
});
}
ShakeListener.java:
package com.my.app;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.widget.Toast;
import android.content.Context;
import java.lang.UnsupportedOperationException;
public class ShakeListener implements SensorEventListener
{
private static final int FORCE_THRESHOLD = 700;
private static final int TIME_THRESHOLD = 100;
private static final int SHAKE_TIMEOUT = 500;
private static final int SHAKE_DURATION = 1000;
private static final int SHAKE_COUNT = 5;
private SensorManager mSensorMgr;
private float mLastX=-1.0f, mLastY=-1.0f, mLastZ=-1.0f;
private long mLastTime;
private OnShakeListener mShakeListener;
private Context mContext;
private int mShakeCount = 0;
private long mLastShake;
private long mLastForce;
public interface OnShakeListener
{
public void onShake();
}
public ShakeListener(Context context)
{
mContext = context;
resume();
}
public void setOnShakeListener(OnShakeListener listener)
{
mShakeListener = listener;
}
public void resume() {
mSensorMgr = (SensorManager)mContext.getSystemService(Context.SENSOR_SERVICE);
if (mSensorMgr == null) {
throw new UnsupportedOperationException("Sensors not supported");
}
boolean supported = false;
try {
supported = mSensorMgr.registerListener(this, mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);
} catch (Exception e) {Toast.makeText(mContext, "Shaking not supported", Toast.LENGTH_LONG).show();}
if ((!supported)&&(mSensorMgr != null)) mSensorMgr.unregisterListener(this);
}
public void pause() {
if (mSensorMgr != null) {
mSensorMgr.unregisterListener(this);
mSensorMgr = null;
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) { }
public void onSensorChanged(SensorEvent event)
{
if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER)
return;
long now = System.currentTimeMillis();
if ((now - mLastForce) > SHAKE_TIMEOUT) {
mShakeCount = 0;
}
if ((now - mLastTime) > TIME_THRESHOLD) {
long diff = now - mLastTime;
float speed = Math.abs(event.values[0] + event.values[1] + event.values[2] - mLastX - mLastY - mLastZ) / diff * 10000;
if (speed > FORCE_THRESHOLD) {
if ((++mShakeCount >= SHAKE_COUNT) && (now - mLastShake > SHAKE_DURATION)) {
mLastShake = now;
mShakeCount = 0;
if (mShakeListener != null) {
mShakeListener.onShake();
}
}
mLastForce = now;
}
mLastTime = now;
mLastX = event.values[0];
mLastY = event.values[1];
mLastZ = event.values[2];
}
}
}
从较低的灵敏度开始,但如果高于某个初始阈值的振动持续较长时间,则逐渐增加灵敏度。这类似于人类的感知 试试这个……让我知道
public class ShakeListener implements SensorEventListener {
private String TAG = ShakeListener.class.getSimpleName();
private static final int FORCE_THRESHOLD = 800;
private static final int TIME_THRESHOLD = 100;
private static final int SHAKE_TIMEOUT = 500;
private static final int SHAKE_DURATION = 1000;
private static final int SHAKE_COUNT = 5;
private SensorManager mSensorMgr;
private float mLastX = -1.0f, mLastY = -1.0f, mLastZ = -1.0f;
private long mLastTime;
private OnShakeListener mShakeListener;
private Context mContext;
private int mShakeCount = 0;
private long mLastShake;
private long mLastForce;
public interface OnShakeListener {
public void onShake();
}
public ShakeListener(Context context) {
Log.d(TAG,"ShakeListener invoked---->");
mContext = context;
resume();
}
public void setOnShakeListener(OnShakeListener listener) {
Log.d(TAG,"ShakeListener setOnShakeListener invoked---->");
mShakeListener = listener;
}
public void resume() {
mSensorMgr = (SensorManager) mContext
.getSystemService(Context.SENSOR_SERVICE);
if (mSensorMgr == null) {
throw new UnsupportedOperationException("Sensors not supported");
}
boolean supported = false;
try {
supported = mSensorMgr.registerListener(this,
mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_GAME);
} catch (Exception e) {
Toast.makeText(mContext, "Shaking not supported", Toast.LENGTH_LONG)
.show();
}
if ((!supported) && (mSensorMgr != null))
mSensorMgr.unregisterListener(this);
}
public void pause() {
if (mSensorMgr != null) {
mSensorMgr.unregisterListener(this);
mSensorMgr = null;
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER)
return;
long now = System.currentTimeMillis();
if ((now - mLastForce) > SHAKE_TIMEOUT) {
mShakeCount = 0;
}
if ((now - mLastTime) > TIME_THRESHOLD) {
long diff = now - mLastTime;
float speed = Math.abs(event.values[SensorManager.DATA_X]
+ event.values[SensorManager.DATA_Y]
+ event.values[SensorManager.DATA_Z] - mLastX - mLastY
- mLastZ)
/ diff * 10000;
if (speed > FORCE_THRESHOLD) {
if ((++mShakeCount >= SHAKE_COUNT)
&& (now - mLastShake > SHAKE_DURATION)) {
mLastShake = now;
mShakeCount = 0;
Log.d(TAG,"ShakeListener mShakeListener---->"+mShakeListener);
if (mShakeListener != null) {
mShakeListener.onShake();
}
}
mLastForce = now;
}
mLastTime = now;
mLastX = event.values[SensorManager.DATA_X];
mLastY = event.values[SensorManager.DATA_Y];
mLastZ = event.values[SensorManager.DATA_Z];
}
}
}
检查震动次数较多的加速度。看看这段代码,它对我有用
private final SensorEventListener mSensorListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent se) {
float x = se.values[0];
float y = se.values[1];
float z = se.values[2];
mAccelLast = mAccelCurrent;
mAccelCurrent = (float) Math.sqrt((double) (x * x + y * y + z * z));
float delta = mAccelCurrent - mAccelLast;
mAccel = mAccel * 0.9f + delta; // perform low-cut filter
if (mAccel > 8) {
Toast.makeText(getApplicationContext(),
"You have shaken your phone", Toast.LENGTH_SHORT).show();
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
Log.i("Sensor", "mAccel" + mAccel);
}
};
这对我来说很好:
public class ShakeEventListener implements SensorEventListener {
public final static int SHAKE_LIMIT = 15;
public final static int LITTLE_SHAKE_LIMIT = 5;
private SensorManager mSensorManager;
private float mAccel = 0.00f;
private float mAccelCurrent = SensorManager.GRAVITY_EARTH;
private float mAccelLast = SensorManager.GRAVITY_EARTH;
private ShakeListener listener;
public interface ShakeListener {
public void onShake();
public void onLittleShake();
}
public ShakeEventListener(ShakeListener l) {
Activity a = (Activity) l;
mSensorManager = (SensorManager) a.getSystemService(Context.SENSOR_SERVICE);
listener = l;
registerListener();
}
public ShakeEventListener(Activity a, ShakeListener l) {
mSensorManager = (SensorManager) a.getSystemService(Context.SENSOR_SERVICE);
listener = l;
registerListener();
}
public void registerListener() {
mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
}
public void unregisterListener() {
mSensorManager.unregisterListener(this);
}
public void onSensorChanged(SensorEvent se) {
float x = se.values[0];
float y = se.values[1];
float z = se.values[2];
mAccelLast = mAccelCurrent;
mAccelCurrent = (float) FloatMath.sqrt(x*x + y*y + z*z);
float delta = mAccelCurrent - mAccelLast;
mAccel = mAccel * 0.9f + delta;
if(mAccel > SHAKE_LIMIT)
listener.onShake();
else if(mAccel > LITTLE_SHAKE_LIMIT)
listener.onLittleShake();
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {}
}
通过乘以增量来缩放它怎么样?试试这个。如果您进行了灵敏度控制,请解释灵敏度控制的值更改。如果您进行了灵敏度控制,请解释灵敏度控制的值更改。这将检测到任何可能不是震动的突然单次移动-只需放下手机即可激活它。